Personal Lubricant

My boyfriend and I almost always need to use a lubricant because we have sex so often that it can get dry down there. We always use the one on the left because it is natural and I do not get yeast infections from it. We decided to spend $20 on the First Response Pre Seed personal lubricant and it sucked. It didn't last long at all. It was pointless. It makes me discouraged because lubricant can kill sperm and make it hard for the sperm to travel to the egg. Has anyone else used the pre seed lubricant and hated it too? Has anyone else gotten pregnant from using a different kind of lube? Has anyone used the lube on the left and liked it? Comment your responses! Thanks.